Electric-arc lamp.



No. 689,356. f Patented nec. I7, |901.

1- c. EscHwEl.

ELECTRIC ARG LA MP. (Application filed Mgr. 27, 1901.) .mn Modem v 2 gheets-lsheet Wjwuniru um mi@ y a lama-l lllll -nun" A TTOHNE YS No. 689,356. Patented Dec. |7,`|9u1.

c. EscHwr-:L

ELECTRIC ARC LAMP.

(Application filed Mar. 27, 1901.)

'm usss ravens oo.' wwwmain wnwmmon. uA c,

' Nrrnn STATES @maar muon.

CHARLES ESOIHWEI, OF NEW YORK, N. Y., ASSGNOR OF ONE-HALF TO MORRIS DUKLAUER, OF MOUNT VERNON, NEW YORK.

ELECTRIC-ARC L Alva P.l

SPECIFICATION forming part of Letters Patent NO. 689,356, dated December 17, 1901.

lApplication tiled March 27, 190] Serial No. 53,060. (No model-l To all whom it may concern.-

Be it known thatLCHARLEs EsoHvvEr,a citizen of the United Stat-es,residing in New York, borough of Queens, in the State of New York, have invented certain' new and useful Improvements in Electric-Arc Lamps, of which the following is a specification.

This invention relates to certain improvements in electric-arc lamps of that class in which the uppercarbon is fed by gravity, so

as to form an arc,by theacti'on of a solenoid and a magnetic core, which is connected by intermediate mechanism with a clutch that engages or releases the upper carbon under the iniluence of the varying resistance of the arc of the lamp upon the solenoid.

My invention consists of an electric-arc lamp which comprises the combination of .a solenoid, a movable magnetic core in said solenoid provided with a iiange at its lowei` end, a lamp-frame provided with a guide-rod, a carbon-holder guided on said rod, a plate at the lower end of said guide-rod and through which the upper carbon carried by said carbon-holder passes, a supporting-rod fixed at its upper end to said flange at one side of the movable core, a clutch pivoted intermediately of its length to the lower end of said supporting-rod and resting on said plate at its toe, whereby it is adapted to engage the upper carbon, and a spring ixed at its upper end to said flange at a point opposite to the point of attachment of said supporting-rod, said spring acting to press the toe of the clutch upon the said plate, as will be fully described hereinafter and inally claimed.

The invention consists, further, in certain details of construction and combinations of parts, which will be fully described hereinafter and finally pointed out in the claim.

In the accompanying drawings, Figure l represents a front elevation of my improved electric-arc lamp for multiple-arc circuits. Figs. 2 and 3 are vertical transverse sections through the solenoid and magnetic core of the same, drawn on a larger scale; and Fig. 4; is a side elevation of the lamp.

` Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a solenoid which is suspended by a tubular rod a from the top plate B of the lamp, said top plate being provided with suitable means for suspending the lamp. The top plate B is provided with binding-posts b IJ, respectively, for the incoming and the outgoing current conductorsk and with two downwardlyextending parallel suspension or guide rods C, that extend some distance below the solenoid 4 A and carry at their lower ends a disk-shaped plate B of somewhat smaller size than the top plate B. n To the plate B are attached two parallel suspension-rods D for the lower carbon, which extend in downward direction and carry at their lower ends a connecting-bar D, which is provided with a central socket e for -receiving the lower stationary carbon E.

From ,the top plate B is suspended,l by means of suitable hanger-screws b2, a diskshaped top plate h3, which fits over the glass globe G, that incloses the lower part of the upper carbon E and the lower carbon E and rests on the socket e. The upper carbon El extends through the center ot' the top plate B and is attached at its upper end to a holder formed by cross-piece E2, whichl is guided on the parallel guide or suspension rods O, said cross-piece sliding freely thereon. The upper end of the upper carbon-El is securely supported in the central socket of the holder or cross-piece E2 by a clamping-screw e2.

On the top plate B' rests a clutch F of any approved construction, preferably of the construction shown in United States Letters Patent No. 620,759, granted tome on March 7, 1899. The clutch -lever is connected by a pivot fo with a rod f, that is screwed at its upper end into the lower flanged end a.' of the magnetic core A', which extends into the interior of the solenoid A, the flange a'being also connected by a helical spring s with the outer end of the clutch-lever, which spring maintains a downward pressure on the toe or,

IOO

on by the solenoid, said short core A2 acting as an abutment, against which the upper end of the core A abuts when drawn in by the joint action of the solenoid and the short magnetic core A2. By this joint action of the solenoid and the xed magnetic core Aza more effective action on the movable core A is exerted, and thereby a quicker and more effective action of the clutch on the upper carbon obtained. The feeding of the upper carbon toward the lower carbon is accomplished by the clutch and the action of the solenoid on its smaller core A', the clutch exerting a wedge-like or binding action on the carbon, so as to obtain a purchase thereon when the same is to be lifted, while it serves to release the carbon when the clutch is moved in downward direction into horizontal position by the rodfconnecting it with the movable core of the solenoid, as shown in Fig. 4. When the clutch is moved in downward direction, the upper carbon is permitted to slide down while it is engaged by the clutch and is moved in upward direction as soon as the magnetic core A is sucked in by the current passing through the solenoid A. The clutch will always be raised by the connection of the connectingrod b with the outer end of the clutch, so that the clutch grips the upper carbon 'firmly and raises it, together with its carbon-holder or cross-piece E2, which is guided on the parallel suspension-rods C. As soon as the current in the solenoid is diminished by the resistance to the current caused by increased size of the arc the magnetic core A' begins to slide down slowly, which motion is transmitted by the connecting-rod b to the clutch F, so that the same is lowered sufficiently to release the upper carbon, which will then be free to slide down under the inuence of gravity until arrested again by the action of the solenoid A on the core A', due to the increased current passing through the solenoid. The increasing and decreasing resistance produces, by the larger or smaller size of the arc between the carbons and the consequent decreasing and increasing of the current passing through the coils of the solenoid, the alternate raising and. lowering of the movable magnetic core together with the connecting-rod and clutch, and thereby the alternating clutching and liberatingof the upper carbon so that a uniform size of are between the ends of the carbons is obtained. The current is conducted from the line-wire to the binding-posts b and from the same by wire b to the solenoid, through the coils of the same by Wire b5 to the cross-piece E?, from the latter to the upper carbon, then through the lower carbon and its socket along the rods D and top plate B', then along a conductor b* in one of the rods C and the top plate B to the binding-post b', and thence to the outgoing line-wire.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In an electric-arclamp, the combination of a solenoid, a movable magnetic core in said solenoid, provided with a flange at its lower end, a lamp-frame provided with a guiderod, a carbon-holder guided on said rod, a plate at the lower end of said guide-rod and through which the upper carbon carried by said carbon-holder passes, a supporting-rod fixed at its upper end to said fiange, at one side of the movable core, a clutch pivoted intermediately of its length to the lower end of said supporting-rod and resting on said plate at its toe whereby it is adapted to engage the upper carbon, and a spring fixed at its upv per end to said liange, at a point opposite to the point of attachment of said supportingrod, said spring acting to press the toe of the clutch upon the said plate, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CI-IAS. ESCIIW'EI.

Witnesses:

Guo. L. WHEELooK, MARGARET P. POTTER. 

